Key points are not available for this paper at this time.
ence now of such differentials in societies with very different social structures to those of Britain today. When Chapin documented mortality differentials in Providence in 1924 he hoped that such a demonstration would be preparation for "what should be of great value, namely a study of the habits of life and environment which make for the longevity of the well-to-do."28 This still pertains.
Irvine Loudon (Sat,) studied this question.